Improvement in pumps



an eine Letters Patent No.111,227, dated January 24, 1871.

IMPROVEMENT IN PUMPS.

v The' Schedule referred to in these Letters Patent and making part oi the same.

To all whom 'it 'may concern:

Be it known that I, JOHNH..MCGOWAN, of Oincinnati, Hamilton county, State of Ohio, have in-y vented 'a certain new and useful 'Improvement in Doubleaeting Force-Pumps; and I hereby declare the following to be asuiciently full, clear, and exact description thereof to enable one skilled iu the art to which my invention appertains to make and use it, reference being had to the accompanying drawing making part ot' this specification.

Nature and Objects of Invention.

tion-air vessel, between the strokes of the pump.

Description of the Accompanying Dran-ing. Figurev l is a perspective view of my improved pump, with the valve-chamber caps removed.

Figure 2 is a vertical section. I Figure 3 is across or horizontal section through the discharge-valve chamber. p

Figure 4 is a plan of the baseplate of the pump.

' r'encrnIDescr/ipz'tion. 'A is the principal casting of 'the pump, and` it embodies in one piece the cylinders B O, the side pipe D, the ascending water-passage E, the valve-cham- `bers F I"I G, (for the suction-valves and dischargevalves,) and the suction-air vessel H.

This cast-ing is united to the base-plate I by a single joint, and connects with the discharge air-vessel- J at the top, in the manner shown.

All the water received by the pump is carried up the passage E, and this passage communicates with the chambers F F' of the suction-valves K K sep a-rately, the partition L, separating the chambers, as shown. Chamber F connects with the lower endl of the pump-barrel 4B by means oi'- the side-passage D, and chamber F' with the upper end of the pump-barrel by means of passage M. i

The chamber G is litted with the two dischargevalves N N', and the airvessel`J,with whiclrthis chamber communicates, contains the' discharge-pipe P, which hangs from the top of the air-vessel and reaches to a point nearthe bottom or neck.

rIhe side pipe D'aud passage M necessarily serve the double purpose of receiving the water for the pump-barrel and discharging the same,

Upon the base-plate I ot' the pump, and immediately below the suction-air vessel H, a valve, R, is fitted, which serves the purpose indicated iu'the preamble of this specication, viz., to retain all the water delivered to the pump, prevent the air in vessel II from driving the water back at the termination of each stroke of the pump under slow motion, and also relieve the joints of thesuction-pipes from the sudden rarnming ot' the water bythe suetion-air vessel between the 'strokes of the pump.V

It will be observed that this valve is not an essential one for 'governing the supply of water to eachend of` the pump, and preventing therpiston from forcing' i it back, as the valves K K perform these functions completely.

lhe valve It performs its part independent of' the necessary pump-valves..

O' leien.

I claim- In 'combination with a pump, the supplemental valve It and suction-air vessel H, arranged and operating substantially as set forth.

llVitnesses:

' J. L. WARTMANN7 F. LAYMAN. 

